3,4-Dimethylisoxazol-5(2H)-one CAS 18655-21-5
| CAS No. | 18655-21-5 |
| Molecular Formula | C5H7NO2 |
| Molecular Weight | 113.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3,4-Dimethylisoxazol-5(2H)-one (CAS 18655-21-5), molecular formula C5H7NO2 and molecular weight 113.11 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3,4-Dimethylisoxazol-5(2H)-one (C5H7NO2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 3,4-Dimethylisoxazol-5(2H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H7NO2 |
| Molecular Weight | 113.11 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Dimethylisoxazol Standards
- 3,5-Dimethylisoxazol-4-ol (CAS 13054-62-1)
- 3,4-Dimethylisoxazol-5(4H)-one (CAS 15731-93-8)
- N,5-Dimethylisoxazol-4-amine (CAS 103747-81-5)
- 3,5-Dimethylisoxazol-4-amine (CAS 31329-64-3)
- 4,5-Dimethylisoxazol-3-amine (CAS 13999-39-8)
- 1-(4,5-Dimethylisoxazol-3-yl)ethanone (CAS 102074-57-7)
- 2-(3,5-Dimethylisoxazol-4-yl)acetaldehyde (CAS 117504-29-7)
- 1-(3,5-Dimethylisoxazol-4-yl)-N-methylmethanamine (CAS 893641-32-2)
Recommended Standards
- 5-Vinyloxazolidin-2-one (CAS 1856-28-6)
- 6-Oxa-1-azaspiro[3.3]Heptan-2-one (CAS 1936339-66-0)
- 3-hydroxytetrahydrofuran-3-carbonitrile (CAS 183162-37-0)
- (1R,3S,4S)-2-azabicyclo[2.1.0]Pentane-3-carboxylic acid (CAS 68517-49-7)
- 2-Methyl-5α-androst-2-en-17β-ol (CAS 2984-17-0)
- 4-((4-Benzylpiperazin-1-yl)methyl)-5,7,8-trimethyl-2H-chromen-2-one dihydrochloride (CAS 1215550-40-5)
- 2-(Ethylamino)propan-1-ol (CAS 24417-04-7)
- (S)-2-Amino-3-(4-ethynylphenyl)propanoic acid (CAS 278605-15-5)
- 3-Methyl-1,2,3,4-tetrahydroquinoline hydrochloride (CAS 1956306-78-7)
- 6-Methylisoquinoline-3-carbonitrile (CAS 1782916-65-7)
- 5-Fluoro-2-isopropoxybenzaldehyde (CAS 610797-48-3)
- 2-(1-Cyclononen-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1041002-91-8)
- 4-Methyl-N-(2-methylcyclohexyl)pyridin-3-amine (CAS 1343709-45-4)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com